Well I got the white one, I cant weigh it up, they look like OEM but I am not sure and here is why.
Followed the video, very good thank you for that, the hardest part was getting the old black case off, it was starting to do my head in. My headphone port was actually attached to the phone not the case, weird but saved me a job. The coil came off without too much bother, aligned it on the new case and stuck it down, then the usb part and I was ready to put the phone back together, this is where the problem started.
I pushed it back together but had a large bulge down the left, it would just not go in properly, I fiddled and pressed but nothing, then a small shard of my new white case snapped off!!!!!
By now I was literally about ready to cry, I figured out what was wrong, the black strips on the inside where the phone would slide in where damaged, the little guide rails where the lugs on the phone slide into where squished, hence stopping the phone fitting in.
I had to take the black strips from my old black case, maybe they are OEM but some sort of rejects or faulty ones, or maybe I was just unlucky, also surprised that is chipped. Anyway did not work out for me.